公开(公告)号：US11920677B2

公开(公告)日：2024-03-05

申请号：US17590273

申请日：2022-02-01

Applicant: Caterpillar Inc.

Inventor： Christopher W. Pruess ,  Aaron B. Crabtree ,  Jeremiah C Johnson

IPC: F16H61/4104 ,  F16H57/04 ,  F16H61/4139 ,  F16H61/4165

CPC classification number: F16H61/4104 ,  F16H57/0408 ,  F16H57/0412 ,  F16H61/4139 ,  F16H61/4165

Abstract: A system including a gearbox and a hydraulic machine connected by a working fluid circuit. The gearbox including a gearbox housing having first and second gearbox fluid passages integrated into the gearbox housing. The hydraulic machine including a case having first and second hydraulic machine fluid passages, the first and second hydraulic machine fluid passages being integrated into the case. A set of rotating elements enclosed within the case. The first gearbox fluid passage and the first hydraulic machine fluid passage align to form a feed passage to conduct fluid at a first pressure from a first source to the set of rotating elements. The second gearbox fluid passage and the second hydraulic machine fluid passage align to form a charge passage to conduct fluid at a second pressure from a second source to the set of rotating elements. The first pressure being less than the second pressure.